METHOD FOR PRODUCING A HOLLOW VALVE FOR INTERNAL COMBUSTION ENGINES
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United States of America Patent
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Issued Date -
May 19, 2022
app pub date -
Jan 30, 2020
filing date -
Jan 30, 2020
priority date (Note) -
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Abstract
The invention relates to a method for producing a valve body for a hollow valve. Said method comprises the following steps: providing a workpiece, blank or semi-finished product and a forming punch, introducing a protective layer between the workpiece and the forming punch (22) and press forming the workpiece to produce a preform. The invention also relates to a hollow valve produced by means of this method.
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